brushless set-up ???

hyper 7 , mm esc , nemesis blue xlt motor , 2 x's 2s5000 true rc lipo's , 46 and 15 gears . motor and esc got hot today after about 10 to 15 minutes of run time. dont know exactly how hot , but was hot to touch after about 6 or 7 seconds so i shut the buggy down. is this a good set-up ? and is there something i can do besides a fan to cool things down ? maybe a cap ? and where would i solder the cap, to the pos- and neg- on the mm's battery conector wire's?? help , somebody please!